• What are the effects of consuming cannabis on mental health?

    Consuming cannabis can produce effects that induce mild or temporary symptoms of anxiety, paranoia and delusional beliefs or cause more permanent mental impairment. In some people, cannabis consumption increases the risk of developing mental illnesses, such as psychosis or schizophrenia.

    Those who start consuming cannabis at a young age, consume it daily and have a family history of mental illness are at a greater risk. The effects and onset of these illnesses may also be worsened by consuming high-THC cannabis products. Frequent cannabis consumption has also been associated with an increased risk of suicide, depression and anxiety disorders.

    Cannabis consumption may also exacerbate symptoms of existing mental health problems, though further research is required.

  • Is cannabis addictive?

    Yes, cannabis can be addictive. Not everyone who consumes cannabis will develop problematic use, but regular consumption can have adverse effects on health. Approximately one in 10 adults who have ever consumed cannabis will develop cannabis use disorder. Consuming cannabis before age 25, over a long period and combining cannabis with tobacco all increase the potential of cannabis use disorder and other health risks.

  • Is second-hand smoke harmful?

    Second-hand smoke is harmful, but the severity depends on many factors, including the amount of smoke, frequency of use, ventilation and more. Little is known about the effects of cannabis smoke on lung health. However, cannabis smoke irritates the throat and lungs, and contains chemicals and tar that are similar to tobacco smoke, which can increase your risk for cancer and lung disease.

  • What should I do if I’ve consumed too much cannabis?

    Seek immediate medical attention if you’re experiencing chest pain, panic attacks, loss of contact with reality or seizures or if your instincts tell you something serious is happening.

    Consuming too much tetrahydrocannabinol (THC) can lead to unpleasant short-term effects, both physically and mentally, including anxiety, paranoia and panic. The good news is these effects, while uncomfortable, are temporary and will pass. 

    While you wait, stay calm, hydrate, eat a snack and relax in a safe place. Distraction techniques such as listening to music or watching TV can also help. If you experience severe symptoms like chest pain, panic attacks or loss of contact with reality, seek immediate medical attention.

  • Can cannabis have adverse effects when used with any medications?

    Yes. Avoid mixing cannabis and other drugs, including alcohol and prescription medications. Cannabis can increase the rate at which some drugs are metabolized. It can also amplify the effects of some substances, including central nervous system depressants such as alcohol and benzodiazepines (like Valium, Klonopin, Xanax and Ativan), and stimulants such as amphetamines and cocaine. 

    If you’re currently taking a prescription or over-the-counter medication, speak to your doctor or a pharmacist about possible interactions and adverse effects. 

  • What should I do if my child ingests cannabis?

    Seek medical attention immediately. Call 911 if the child appears ill or has trouble breathing. Symptoms may include drowsiness, anxiety or lack of coordination.

    Learn more about safe storage.

  • How should I store cannabis?

    Dried cannabis should be kept in a dry, cool place. If you have children or pets in your home, ensure all cannabis products are kept safely out of reach and ideally kept in a secure childproof container.